BISOPE series 46 How do sound waves travel where there is no light refr...

BISOPE series 46- How do sound waves travel where there is no light? (refraction and diffraction)

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We are taught that light is faster than anything else, so we miss the meaning of having powerful energy. Therefore, wherever the light reached, there was hot energy. However, it was not always so where the sound reached. I could hear the sound even in the dark. I heard it even though it was blocked.

If sound and light are transmitted to an invisible place, let's say that they can be seen as passing through an obstacle or being reflected secondarily on another plane. But if you can hear sound in the back corner where there is no such thing, how on earth can you explain this?

Huygens–Fresnel principle

 

Waves appear in the form of light, sound, surface waves, earthquakes, vibrations, etc., and have characteristics of reflection, refraction, and diffraction. Light is a transverse wave in which the direction of vibration of the medium and the direction of propagation of the wave are different, but sound is a longitudinal wave having a wave of low density (low density, high density medium) in the direction of propagation of the wave. If the sound propagation direction is referred to as a sound ray, the perpendicular plane is called a 'wavefront' (a plane obtained by connecting all points of the same phase when the wave propagates).

The principle by which sound can be heard in a confined, narrow, and dark place is explained by Huygens' principle. “Each point on one wavefront becomes the point source of the next wavefront, and a spherical wave is generated. The envelope that touches all of the spherical waves created by these point sources becomes the next wavefront.” Huygens' principle can be used to explain the phenomena of reflection, refraction, interference, and diffraction of waves.

 

division	Refraction	Diffraction
explanation	bending of the sound ray	Propagation of sound in areas behind obstacles
theory	Snell's Law   When the medium changes, the angle of incidence and angle of transmission change.	Huygens–Fresnel principle
phenomenon	- deflects to the lower speed of sound   - Refraction towards the lower temperature.   - bends in the direction the wind blows	- The larger the wavelength, the more diffraction occurs.   -The smaller the size of the obstacle (the smaller the hole, the more diffraction.

https://blog.naver.com/vs72